Oil pump



May 8, 1928.

1,669,306 M. RlEsNl-:R

OIL PUMP Filed March 31, 1926 2 Shee"f.s-Sheeu l M/cfmn Hfs/via..

ATTORNE Y May 8, 1928. 1,669,306

. M. Rn-:sNER

OIL PUMP Filed March 3l. 1926 2 Sheets-Sheet? "Hyf 'wh ATTORNEY Patented May 8, `1928.

UNITED STATES PATENT OFFICIEL.-

. MICHAEL RIESNER, OF CINCINNATI, OHIO, ASSIGNOR TO WOR'IHINGTON PUMP AND MACHINERY CORPORATION, 0F NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

OIL PUMP.

Application led March 31, 1926. Serial No. 98,648.

This invention relates to pumps,'and more particularly to lubricating pumps of the type used with other mechanism for pumping lubricant to the working parts of the mechanism.

An object of the present invention is to provide a simple and eiicient lubricating pump which maybe constructed and assembled as an independent, complete mechanism or unit and connected to the mechanism with which it is associated by hanging it upon a working shaft of the mechanism, thereby adding materially to the ease with which Vthe lubricating pump may be attached to the mechanism, and also facilitating the manufacture and assembly of the lpump structure by permitting pumps constructed in accordance with the invention to be made in standard sizes, and mounted on the mechanism with which it is to be associated, as needed.

Withthese objects in view, the invention consists in various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing an oil pump of the preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings- Figure 1 is a perspective view of the improved lubricating pump.

Figure 2 is a vertical section through the pump. t

Figure 3 is a detailed section taken on the line 3 3 of Figure 2.

Figure 4 is a detailed view of the piston operating yoke of the pump.

Figure 5 is a front view of the pump showing it mounted upon an associated mechanism and taken on the line 5--5 of Figure 6.

Figure 6 is a side elevation of the pump showing it mounted upon a mechanism with which it is associated.

Referring more particularly to the drawings, the improved lubricating pump as illustrated in Figures 1 to 3 is associated with a working shaft A of any suitable mechanism, while in Figures 5 and 6 of the drawings, the pump is illustrated as mounted upon the crankshaft A of an air compressor or analogous mechanism B, it being understood lower suction section 3, detachably connected in any suitable manner. The upper section 2 comprises a pair of spaced arms 4 and 5 which are bored to permit them to be mounted over' the Working shaft A for supporting the pump structure in a pendulum-like manner from the shaft A and free to swing relative to the shaft. The shaft A has its end C reduced in diameter over the main body of the shaftand it further has a reduced, threaded terminal D. An eccentric 6 is provided in the pump structure,l mounted upon the portion C of the shaft fA and positioned between the arms 4 and 5; The arm 4 is provided with a bore'7 sufficiently large to permit the passage of the eccentric 6 therethrough in the assembling of the pump structure, and a flanged collar 8 is provided which fits within the bore 7, and retains the eccentric 6 in position against longitudinal movement upon the shaft. A nut 9 is threaded on the threaded terminal D of the shaft A and securely clamps the pump structure in position, clamping the collar 8 against the eccentric 6 and the latter against the shoulder E formed on the shaft A. To prevent the nut 9 from working ofi' the threaded terminal D it is provided with a disc-like projection 10, which is provided with a plurality of circumferen-tially-spaced, radial notches 11 which receive a Cotter pin 12 which is inserted through the terminal D.

The operating yoke 12 which is substantially semi-circular in side elevation is positioned between the arms 4 and 5 and has facing,flat working surfaces 13 which engage tlie perimeter of the cam 6. A pin 14 is connected to the working yoke 12'and has an enlarged, threaded portion 15 thereon which threads into the interior of the hollow ypiston 16 of the pump structure; The piston 16 reciprocates within -the bores 17 and 18 of the sections 2 and 3 of the pump housing and it urged in its upward position by a spring 19 mounted in the bore 18 and engaging at one end against the inner end of the piston 16 and at its other end against a suitable resting plate 20 positioned at the lower end of the bore 18.

The piston 16 is hollow and upon its upward movement it draws the lubricating oil from the oil sump of the mechanism upwardlythrough the inlet opening 21 in the section 3 of the housing 1, and on the downward drop of the piston the oil is prevented from passing out through the opening 21 by the valve ball 22, and during the down- -ward movement of the piston the oil passes through the inlet'23 into the interior of thel piston 16 passing outwardly from the piston through the openings 24 into the oil ducts 25. In its passa e into the interior of the cylinder 16 the oil passesby the ball check valve 26 which is limited in its movement by the lower end of the pin 14. A suitable fi tering screen 28 is mounted over the lower` end of the section 3.

The lubricating pump structure hangs freely upon the Shaft A in a pendulum-like manner, being free from any other connection with the mechanism with which it is associated and it is held in place by the single nut 9 thereby providing a pump which may be constructed in standard sizes and quantities-and mounted upon or associated with a mechanism, with minimum effort and in a short space of time, also a pump which may be readily removed for repair or replacement when necessary without affecting the mechanism proper.

To prevent swinging of the pump during the operation of the shaft A, a pair of abutment lugs 30 are formed upon the pump housing 1 and the housing F of the mechanism B is provided with companion lugs 31 aligning with the lugs 30 when the pump is in position. In the mechanism shown in Figures 5 and 6, the lubricating pump ma be mounted upon the end of the cranksha t A by removal of the endplate G of the mechanism which permits access to the end of the crankshaft on which the pump is being4 mounted.

Lubricating pumps of similar type to the present inventionhave been heretofore devised which derive their operating power from a working shaft of the mechanism with which the are associated, some of such pumpsl being partly supported from the shaft, but having other connections with the mechanism, increasing the cost of manufacture and attachment to the mechanism and rendering more diflicult and expensive re-y moval of the pump for replacement or repair, in comparison with pumps constructed in accordance with a pump of the present invention.

It will be understood that the invention is not to be limited to the specicconstruetion or arrangement of parts shown but that these may be modified widely within. the invent-ion defined by the claims.

What I claim is:v

1. The combination with a working shaft of a mechanism, of a lubricating pump including a housing having aforked yoke engaging over said working shaft, a piston in said pump, an operating cam between the arms of said yoke and mounted upon and rotatable by said working shaft to operate said piston, aflanged collar carried by one of the arms of theyoke, and means co-operating with the end of the shaft and engaging said collar for holding said pump upon said shaft and maintaining said cam in operative position.

2. The combination with the casin ,and working shaft of a mechanism,.of a libricating pump freely mounted on the shaft and removable therefrom asa complete unit, and means on the casing of the mechanism for preventing swinging movement of the pump and providing` a space aligning with the shaft to permit the pump to be' moved endwise upon the shaft.

3. The combination with a working shaft of a mechanism, of a lubricating pump -hung freely on the shaft, abutment lugs'formed on the lubricating pump, and lugs formed on the mechanism, said pump-carried lugs -adapted to engage the mechanism scarried lugs to prevent swlnging movement of the pump.

' 4.\The combination with a mechanism including a casing'and a Working shaft, of a lubricating pump including a housing freely mounted in pendulum-like 'manner on the shaft and removable therefrom as a complete unit, said housing embodying the discharge `outlet of the ump, wherebylubrication will be delivere to said shaft through a closed conduit under pressure.

5. The combination with 'a mechanism including a casing and a working shaft, of a lubricating pump including a housing freely mounted in pendulum-like manner on the shaft and removable therefrom as a complete unit, said housing embod ing the discharge outlet of the pump, w erebv lubrication will be delivered to said shaft through a closed conduit under ressure, said pump being free from conneetlon with the casing, and means for, preventing swinging movement of the housing.

In testimony whereof I ax my signature.

MICHAEL RIESNER. 

